Some systems might run out of Option ROM space if more than four adapter cards are installed. As a result, some of the cards or ports will not be listed as available for booting over a network.
Workaround: Listed cards or ports that are not used for booting can be disabled in BIOS to make Option ROM space for ports required for booting over the network.
To disable a card or port in BIOS, perform the following steps:
Boot the server to reset/SYS or start/SYS from the SP.
Press the F2 key to enter setup when the server is booting.
Select I/O from the top items.
Select Add In Cards.
Select Slot number.
Select Disable.
Press Esc to get back to the main BIOS menu.
Select Exit.
Select Save Changes and Exit.
Disabling PCI 64 bit resource allocation in BIOS mitigates this problem. To disable PCI 64 bit resource allocation, perform the following steps:
Boot the server to reset/SYS or start/SYS from the SP.
Press the F2 key to enter setup when the server is booting.
Select I/O from the top margin of BIOS menu.
Select PCI Subsystems Settings.
Select PCI 64 bin Resources.
Select Disable.
Press Esc to get back to the main BIOS menu.
Select Exit.
Select Save Changes and Exit.